/Engine/Source/Runtime/Engine/Public/Net/NetworkProfiler.h
Track event occurring, like e.g. client join/ leave
void TrackEvent ( const [FString](API\Runtime\Core\Containers\FString) & EventName, const [FString](API\Runtime\Core\Containers\FString) & EventDescription, [UNetConnection](API\Runtime\Engine\Engine\UNetConnection) * Connection )